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because the configuration becomes too complex due to the multitude of possible situations. In these cases, managing change can become a real nightmare. Network managers can’t manage what they can’t see and measure. Without real-time visibility into end user response times and traffic flows, it’s impossible to manage and optimize application performance. Too often, network managers have no way of knowing how well their organization or service provider is meeting its performance targets.
Other solutions have also emerged in recent years such as WAN optimization controllers (WOCs), which address application performance hurdles in selected portions of the network. Some enterprises have tactically deployed WOCs at sites that exhibit poor end-user experiences for networked business applications. While this opportunistic approach has great advantages because of the immediate relief it provides, not all networks are compatible with such a tactical approach to application performance.
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While
this opportunistic approach has
great advantages because of the
immediate relief it provides,
not all networks are compatible
with such a tactical approach
to application performance. |
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Inability to Scale. WOCs are able to enhance application performance on ten or twenty sites. Very few are able to scale benefits to hundreds or thousands of sites.
The good news is that a new generation of WOCs can cooperate with each other as part of a global WAN optimization system. These systems are more aptly suited for large organizations with a plethora of branch offices. WAN optimization systems offer a more global top-down approach that offer possibilities that are particularly adapted to the problems discussed above. There are four key reasons why:
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For example, most very large international organizations cannot deploy WOCs on their networks. There are four key reasons why:
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Inefficiency. On large networks, these tools very often do not improve performance. Modern networks have meshed topologies that WAN Optimization Controllers cannot handle properly.
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High investment costs. Even if the technology tends to be more affordable, these tools still cost many times more than the cost of a branch router.
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High management costs. WOCs are high-tech devices that need to be configured individually. The configuration of each device needs to be consistent with the others and yet, all devices must reflect local requirements.
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Efficiency. WAN optimization systems address application performance problems globally. They not only reduce the response times of business applications but also guarantee consistent response times regardless of network topology and occurrences on the network.
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Minimal investment costs. The components within WAN optimization systems cooperate with each other so that they can serve the need of all branch offices without requiring a device at each site
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Low management costs. Network managers configure WAN optimization systems globally using application performance objectives. Devices do
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